Dyeing of cotton or linen cloth with vat-colors.



Drawing.

fi'nom KERTESZ, 0F MAINKUR, GERMANY,

STATESlrEFENT OFFIGE.

ASSIGNOR T0 CASSELLA COlI OR COMPANY,

A CORPOEATION 013 NEW' YORK.

' DYEING Dr ams 03 Lmnn CLOTH W TH v'A'ncoLoRs.

Tbiallwhom it may concern; v Be known that I, ADOLF Knn'rnsz, a subjectof theKingdOm Of Hungeuy, and a re ident OfBlSIgIiflICkStIaSSG 5,Mainkur, Ger- 2 mmy, haveinvented-certain new and useful doyered thatthis ohje'ction can be. overcome 111311 alkaline sulfid and an a1kalinehydro-' t-ixlfit are added to theyat dyestuifs in "the "yehath.Preferably the sulfid is added i'styand after dyeing for some time, the

i r hydrosulfite is-added. By this method the dyesti'lfi" is enzibled;to*penetrate thick and y goods to a rniich greater extent than \cforebeen possible.

l majority of vat colors are soluble in c snlfidhnth, but even in thecase of those which are only soluble to a certain extent, a

Specifleetion of Letters latent'. Application filed J'zimiary 13, 1912'. Serial No. 671,161.-

"nsiderable. improvement is efiected as some i Patent "of 'the'colorpenetrate to themiddle of the fabric. y

Example: The jigger is charged with 20 grams indigo MLB/GB, Giba' blue,ali zarin, indigo, etc, 20 grams sodium sulfid crystals, 10' gramscaustic soda lye of 7 5 Tw.,' per liter of liquor. Dye for 1 hour at theboil,- then add 2 tot grams hydrosulfite per liter,-

and dye for about another ha-l-f'hour' at 65 to 70 C.

a Oct. 29, .1912.

Having now described my invention and in what manner the seine is towhat I new claim is: 4

The process of dyeing vat dyes in-heavy and tightly woven cotton and,linen consisting in the following steps: the fabric is first dyed in abath containing sodium'slilfid and then dyed again in the same-bath towhich hydrosulfite has been added substantially as described. I 1

- In witness whereof I have-hereunto signed my name this 28th day ofDec. 1911, in'the presence of two subscribing witnesses.

'- ADOLF'KERTESZ.

Witnesses:

JEAN GRUND, CARL GRUND.

be performed, 4o

